| donaldrsimonn | Дата: Понедельник, 14.03.2022, 18:40 | Сообщение # 1 |
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Статус:  | You've heard the quote “the devil is in the details” and when it comes to duplication of data to SD cards, nothing can be more true. Today we talk about an SD Card Duplicator which provides the ability to data stream unique content to each card.
Typically a user would duplicate the same content to SD cards because they intend to make many copies of the same content. However, my companies who use SD media (or microSD media) want to not only copy the same content to each card, but also copy unique data to each card.
Let us dig a little deeper with an example:
It is very common for companies who generate map data also want to protect their mapping information. Maps are expensive to make and often times hold proprietary information that the company wants to protect. So when it comes time to use an SD Card Duplicator to make hundreds or thousands of copies, it is required to have a protection scheme included with the duplication solution.
A common method to provide protection on SD card media is using the CID number of the card. The CID number is a value which is put into “read only memory” of an SD card and that CID number is unique to each card and follows the card around. It is not possible to copy or duplicate the CID number… it is a value which is designed to only be read. In addition to the unique number, there takes specific vendor commands to read the CID number from the card itself.
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